GLSA 200802-06: scponly: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	scponly: Multiple vulnerabilities
Date:	02/12/2008
Bugs:	#201726, #203099
ID:	200802-06

Synopsis

Multiple vulnerabilities in scponly allow authenticated users to bypass security restrictions.

Background

scponly is a shell for restricting user access to file transfer only using sftp and scp.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/scponly	< 4.8	>= 4.8	All supported architectures

Description

Joachim Breitner reported that Subversion and rsync support invokes subcommands in an insecure manner (CVE-2007-6350). It has also been discovered that scponly does not filter the -o and -F options to the scp executable (CVE-2007-6415).

Impact

A local attacker could exploit these vulnerabilities to elevate privileges and execute arbitrary commands on the vulnerable host.

Workaround

There is no known workaround at this time.

Resolution

All scponly users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/scponly-4.8"

Due to the design of scponly's Subversion support, security restrictions can still be circumvented. Please read carefully the SECURITY file included in the package.

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200802-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.